I like the fact that many of the wines selected are from NZ. I see only a single Californian wine on the list (nothing from Napa or Sonoma, either ... is this a reflection on the airlines that didn't take part ?).

I don't have a huge experience flying business, but lately I've been on Qatar business every other week for the past three months. I can't say they surprised me (the wine has not changed in the last three months), but they have an excellent Bordeaux which I could never afford at home. I drink it "avec plaisir" on each flight. I must admit, arriving to Doha with the taste of those fine tannins in my mouth is a pleasure. Especially because wine in Doha is overpriced and generally not so good.

Being a frequent-flying member of the wine trade, I can only but vote for Qatar who serves in Business Class what I would expect from a Michelin-starred restaurant.
It must be understood that the size of the airline does matter though : It is much easier for a small-medium carrier to have an exciting list than it is for a big player, considering the volumes needed.
Finding out that you will be served an exciting wine from a great producer at 30 000ft while flying above mountains and oceans definitely enhances the experience.